EP 1361296 B1 20060726 - METHOD FOR ELECTROLYTIC PRODUCTION OF ULTRA-PURE ZINC OR ZINC COMPOUNDS FROM ZINC PRIMARY AND SECONDARY RAW MATERIALS
Title (en)
METHOD FOR ELECTROLYTIC PRODUCTION OF ULTRA-PURE ZINC OR ZINC COMPOUNDS FROM ZINC PRIMARY AND SECONDARY RAW MATERIALS
Title (de)
VERFAHREN ZUR ELEKTROLYTISCHEN HERSTELLUNG VON ULTRAREINEM ZINK ODER ULTRAREINEN ZINKVERBINDUNGEN AUS PRIMÄREN UND SEKUNDÄREN ZINKROHSTOFFEN
Title (fr)
PROCEDE DE PRODUCTION ELECTROLYTIQUE DE ZINC OU DE COMPOSES DE ZINC A HAUTE PURETE A PARTIR DE MATIERES BRUTES PRIMAIRES ET SECONDAIRES DE ZINC
Publication
Application
Priority
ES 0100060 W 20010216
Abstract (en)
[origin: EP1361296A1] The process comprises the following stages: a) leaching; b) solid-liquid separation; c) neutralization of the aqueous solution; d) solid-liquid separation of the zinc-rich solution; e) zinc extraction; f) purification of the organic solvent from the extraction stage; g) stripping the ionic zinc loaded in the organic solvent; h) recovering the zinc contained in the aqueous acid solution from the stripping. The following barriers to impurities have been established: gentle leaching; alkaline pulp treatment; treatment of a small stream of aqueous solution, collected before and/or after the zinc extraction at step e); high selectivity of the dissolved zinc extraction; treatment of the zinc loaded in the organic solvent; cleaning treatment of the zinc-laden organic solvent, with an ultra-pure acid solution; partial bleeding and treatment of the stripped organic solvent; bleed of small stream of the final product producing loop, which will be recycled to the organic loop.
IPC 8 full level
C25C 1/16 (2006.01); C22B 3/38 (2006.01); C22B 19/20 (2006.01)
CPC (source: EP US)
C22B 3/384 (2021.05 - EP US); C22B 19/22 (2013.01 - EP US); C22B 19/26 (2013.01 - EP US); Y02P 10/20 (2015.11 - EP US)
Designated contracting state (EPC)
ES FR GB NL
DOCDB simple family (publication)
EP 1361296 A1 20031112; EP 1361296 B1 20060726; BR 0116892 A 20040622; BR PI0116892 B1 20150714; CA 2438016 A1 20020829; CA 2438016 C 20090804; CN 1293232 C 20070103; CN 1492948 A 20040428; ES 2269349 T3 20070401; MX PA03007299 A 20050214; PE 20020899 A1 20021026; PL 202742 B1 20090731; PL 363610 A1 20041129; US 2004031356 A1 20040219; WO 02066708 A1 20020829
DOCDB simple family (application)
EP 01909833 A 20010216; BR 0116892 A 20010216; CA 2438016 A 20010216; CN 01823017 A 20010216; ES 0100060 W 20010216; ES 01909833 T 20010216; MX PA03007299 A 20010216; PE 2002000136 A 20020215; PL 36361001 A 20010216; US 64125003 A 20030814